The following frequency distribution shows the number of crimes committed in a sample of 100 urban neighborhoods. Number of crimes Frequency of Neighborhoods 0-9 10 10-19 20 20-29 30 30-39 30 40-49 10 N 100 What is the (approximate) mean of this distribution? What is the (approximate) standard deviation of this distribution? Construct a histogram for this frequency distribution.(Be sure to use appropriate labels.) In a normal distribution with a mean of 72 and a standard deviation of 12: What percentage of cases will fall above 80? What is the probability that a randomly selected case falls between 60 and 68? What is the value of x at the 10th percentile? What percentage of observations fall below 90?
The following frequency distribution shows the number of crimes committed in a sample of 100 urban neighborhoods. Number of crimes Frequency of Neighborhoods 0-9 10 10-19 20 20-29 30 30-39 30 40-49 10 N 100 What is the (approximate) mean of this distribution? What is the (approximate) standard deviation of this distribution? Construct a histogram for this frequency distribution.(Be sure to use appropriate labels.) In a normal distribution with a mean of 72 and a standard deviation of 12: What percentage of cases will fall above 80? What is the probability that a randomly selected case falls between 60 and 68? What is the value of x at the 10th percentile? What percentage of observations fall below 90?
Social Psychology (10th Edition)
10th Edition
ISBN:9780134641287
Author:Elliot Aronson, Timothy D. Wilson, Robin M. Akert, Samuel R. Sommers
Publisher:Elliot Aronson, Timothy D. Wilson, Robin M. Akert, Samuel R. Sommers
Chapter1: Introducing Social Psychology
Section: Chapter Questions
Problem 1RQ1
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Question
The following frequency distribution shows the number of crimes committed in a sample of 100 urban neighborhoods.
Number of crimes Frequency of Neighborhoods
0-9 10
10-19 20
20-29 30
30-39 30
40-49 10
N 100
- What is the (approximate) mean of this distribution?
- What is the (approximate) standard deviation of this distribution?
- Construct a histogram for this frequency distribution.(Be sure to use appropriate labels.)
- In a normal distribution with a mean of 72 and a standard deviation of 12:
- What percentage of cases will fall above 80?
- What is the probability that a randomly selected case falls between 60 and 68?
- What is the value of x at the 10th percentile?
- What percentage of observations fall below 90?
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